Method of manufacturing double type for type-writing machines.



UNrnn siagne PATENT onrron.

WILLIAM R. FOX, OF GRAND RAPIDS, MICHIGAN.

Specification of Letters Patent.

Patented Aug. 2, 1910.

Application led June 21, 1906. Serial No. 322,718.

T o all whom it may concern.'

Be itknown that I, wWILLIAM R. Fox, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Methods of Manufacturing Double Type for Type- VVriting Machines, of which the following is a specification.

This invention relates to method of manufacturing double type for typewriting machines. i

The objects of the invention are; first: to provide a very light and perfect type, and second: to provide a method of producing type which shall be practical and result in the formation of perfect type expeditiously and with certainty.

Objects pertaining to details will delinitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification.

The invention is clearly defined and pointed out in the claims.

I fullv illustrate my improved type and method of forming the same in the accompanying drawing, a part of this specification, in which- Figure l is a view, somewhat enlarged, of the rough blank as it is punched from a piece of sheet steel; Fig. 2 shows the next step of the process in which the shank is formed by being turned round and smooth; Fig. 3 shows the next step of the process in which the sides of the blank are chamfered to a point at the center; Fig. 4 shows the blank after it has been acted upon by the rocking dies with a thin fin of metal projecting; Fig. 5 shows the finished article, the thin fin of metal having been cut away and the sides of the type finished giving the same a thin and gradual taper from the center each way; Fig. 6 is a detail sectional view on a line corresponding to line 7 7 of Fig. 8 showing the blank of Fig. 3 in the die before pressure is applied to form the type; Fig. 7 is a detail sectional view of the method of forming the type between the rocking dies, taken on a line 7-7 of Fig. 8; and Fig. 8 is a detail sectional view transverse to the sectional view, taken on a line 8 8 of Fig. 7.

In the drawing similar letters of reference refer to similar parts throughout the several views.

Referring to the lettered parts of the drawing: The rough blank in the first place is punched out of a sheet of metal having a generally conformed head A and a shank B, square in contour. At the next step the shank B is finished round, as indicated in Fig. Q At the next step the type head A is chainfered on its face at each side on the projecting ends of the head A being here substantially of even thickness. The type is .then placed between the rocking dies D E, as indicated in Figs. 6 and 7, and pressure is applied as the djies are rockedfwhen the metal flows out into a thin iin around the head. The die being tapered to give the head a taper toward each end, as indicated in Fig. 6, and pressure being applied in this way causes the metal to swage perfectly into the die, so that the type are very perfect and the metal of the type very compact. The type, after this step of the operation, present the appearance indicated in Fig. 4. The thin fin is then trimmed off and the type smoothed up when the finished type of the form appearing in Fig. 5 is the result.

This method of producing type diers from those that have gone before, in that the die is so formed that the metal opposite the type is forced into a comparatively thin wedge shaped or tapering mass from a thick heavy end portion, and the heavy pressure required to do this produces perfect type, and, at the same time, so forms the type that a minimum of metal is used. This will be very clear from examining Figs. 6, 7 and 8, the blank to be' acted on appearing in position in Fig. 6. The advantage is obvious, in the improved product and in the greater efficiency of the process.

I-Iaving thus described my invention, what I claim as new and desire`to secure by Letters Patent, is

1. The process of manufacturing a double type, consisting in punching from sheet metal a blank of the general form, the head A and shank B, rounding the shank and forming the head of equal dimensions from end to end and chamfering the face to a thin apex, swaging the same in a die formed to taper the head toward each end, thereby applying heavy pressure to the type to compact the metal and insure a perfect type, then removing the fin of Inet-al to finish the type, as specied.

2. rl`he process of manufacturing a double type7 consisting in punching from sheet inetal a blank of the general forni, the head A of equal dimensions from end to end transversely and the shank B, rounding the shank then sWaging the head in a die to taper the head toward each end, thereby applying heavy pressure to the face of type to compact and contract the metal and insure a perfect type, then removing the in of metal to iinish the type, as specified.

In Witness whereof, I have hereunto set l my hand and seal in the presence of tWo Witnesses.

KATHARINE KUNZI, ETTA HELMKA. 

